1 | /* |
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2 | * devfs.c - DEVFS File system API implementation. |
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3 | * |
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4 | * Author Mohamed Lamine Karaoui (2014,2015) |
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5 | * Alain Greiner (2016,2017) |
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6 | * |
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7 | * Copyright (c) Sorbonne Universites |
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8 | * |
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9 | * This file is part of ALMOS-MKH. |
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10 | * |
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11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; version 2.0 of the License. |
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14 | * |
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15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | * General Public License for more details. |
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19 | * |
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20 | * You should have received a copy of the GNU General Public License |
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21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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23 | */ |
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24 | |
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25 | #include <hal_kernel_types.h> |
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26 | #include <hal_special.h> |
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27 | #include <hal_uspace.h> |
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28 | #include <printk.h> |
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29 | #include <chdev.h> |
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30 | #include <thread.h> |
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31 | #include <dev_txt.h> |
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32 | #include <cluster.h> |
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33 | #include <vfs.h> |
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34 | #include <kmem.h> |
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35 | #include <devfs.h> |
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36 | |
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37 | ///////////////////////////////////////////////////////////////////////////////////////// |
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38 | // Extern variables |
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39 | ///////////////////////////////////////////////////////////////////////////////////////// |
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40 | |
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41 | extern vfs_ctx_t fs_context[]; // allocated in kernel_init.c |
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42 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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43 | |
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44 | #if (DEBUG_SYS_READ & 1) |
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45 | extern uint32_t enter_devfs_read; |
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46 | extern uint32_t exit_devfs_read; |
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47 | #endif |
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48 | |
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49 | #if (DEBUG_SYS_WRITE & 1) |
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50 | extern uint32_t enter_devfs_write; |
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51 | extern uint32_t exit_devfs_write; |
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52 | #endif |
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53 | |
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54 | /////////////////////////////// |
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55 | devfs_ctx_t * devfs_ctx_alloc( void ) |
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56 | { |
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57 | kmem_req_t req; |
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58 | |
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59 | req.type = KMEM_DEVFS_CTX; |
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60 | req.size = sizeof(devfs_ctx_t); |
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61 | req.flags = AF_KERNEL | AF_ZERO; |
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62 | |
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63 | return (devfs_ctx_t *)kmem_alloc( &req ); |
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64 | } |
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65 | |
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66 | ///////////////////////////////////////////// |
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67 | void devfs_ctx_init( devfs_ctx_t * devfs_ctx, |
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68 | xptr_t devfs_dev_inode_xp, |
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69 | xptr_t devfs_external_inode_xp ) |
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70 | { |
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71 | devfs_ctx->dev_inode_xp = devfs_dev_inode_xp; |
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72 | devfs_ctx->external_inode_xp = devfs_external_inode_xp; |
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73 | |
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74 | fs_context[FS_TYPE_DEVFS].extend = devfs_ctx; |
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75 | } |
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76 | |
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77 | ///////////////////////////////////////////////// |
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78 | void devfs_ctx_destroy( devfs_ctx_t * devfs_ctx ) |
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79 | { |
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80 | kmem_req_t req; |
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81 | |
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82 | req.type = KMEM_DEVFS_CTX; |
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83 | req.ptr = devfs_ctx; |
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84 | kmem_free( &req ); |
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85 | } |
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86 | |
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87 | ///////////////////////////////////////////////// |
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88 | void devfs_global_init( xptr_t parent_inode_xp, |
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89 | xptr_t * devfs_dev_inode_xp, |
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90 | xptr_t * devfs_external_inode_xp ) |
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91 | { |
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92 | error_t error; |
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93 | |
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94 | #if DEBUG_DEVFS_INIT |
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95 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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96 | if( DEBUG_DEVFS_INIT < cycle ) |
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97 | printk("\n[DBG] %s : thread %x enter at cycle %d\n", |
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98 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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99 | #endif |
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100 | |
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101 | // creates DEVFS "dev" inode in cluster 0 |
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102 | error = vfs_add_child_in_parent( 0, // cxy |
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103 | INODE_TYPE_DIR, |
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104 | FS_TYPE_DEVFS, |
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105 | parent_inode_xp, |
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106 | "dev", |
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107 | NULL, |
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108 | devfs_dev_inode_xp ); |
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109 | |
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110 | assert( (error == 0) , __FUNCTION__ , "cannot create <dev>\n" ); |
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111 | |
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112 | #if( DEBUG_DEVFS_INIT & 1 ) |
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113 | if( DEBUG_DEVFS_INIT < cycle ) |
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114 | printk("\n[DBG] %s : created <dev> inode at cycle %d\n", __FUNCTION__, cycle ); |
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115 | #endif |
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116 | |
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117 | // create DEVFS "external" inode in cluster 0 |
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118 | error = vfs_add_child_in_parent( 0, // cxy |
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119 | INODE_TYPE_DIR, |
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120 | FS_TYPE_DEVFS, |
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121 | *devfs_dev_inode_xp, |
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122 | "external", |
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123 | NULL, |
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124 | devfs_external_inode_xp ); |
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125 | |
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126 | assert( (error == 0) , __FUNCTION__ , "cannot create <external>\n" ); |
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127 | |
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128 | #if DEBUG_DEVFS_INIT |
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129 | cycle = (uint32_t)hal_get_cycles(); |
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130 | if( DEBUG_DEVFS_INIT < cycle ) |
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131 | printk("\n[DBG] %s : thread %x exit at cycle %d\n", |
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132 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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133 | #endif |
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134 | |
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135 | } |
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136 | |
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137 | /////////////////////////////////////////////////// |
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138 | void devfs_local_init( xptr_t devfs_dev_inode_xp, |
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139 | xptr_t devfs_external_inode_xp, |
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140 | xptr_t * devfs_internal_inode_xp ) |
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141 | { |
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142 | char node_name[16]; |
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143 | xptr_t chdev_xp; |
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144 | cxy_t chdev_cxy; |
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145 | chdev_t * chdev_ptr; |
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146 | xptr_t inode_xp; |
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147 | uint32_t channel; |
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148 | |
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149 | #if DEBUG_DEVFS_INIT |
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150 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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151 | if( DEBUG_DEVFS_INIT < cycle ) |
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152 | printk("\n[DBG] %s : thread %x enter at cycle %d\n", |
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153 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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154 | #endif |
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155 | |
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156 | // create "internal" directory linked to "dev" |
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157 | snprintf( node_name , 16 , "internal_%x" , local_cxy ); |
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158 | vfs_add_child_in_parent( local_cxy, |
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159 | INODE_TYPE_DIR, |
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160 | FS_TYPE_DEVFS, |
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161 | devfs_dev_inode_xp, |
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162 | node_name, |
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163 | NULL, |
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164 | devfs_internal_inode_xp ); |
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165 | |
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166 | // create MMC chdev inode |
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167 | chdev_xp = chdev_dir.mmc[local_cxy]; |
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168 | if( chdev_xp != XPTR_NULL) |
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169 | { |
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170 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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171 | vfs_add_child_in_parent( local_cxy, |
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172 | INODE_TYPE_DEV, |
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173 | FS_TYPE_DEVFS, |
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174 | *devfs_internal_inode_xp, |
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175 | chdev_ptr->name, |
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176 | GET_PTR( chdev_xp ), |
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177 | &inode_xp ); |
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178 | } |
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179 | |
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180 | // create DMA chdev inodes (one DMA channel per core) |
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181 | for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ ) |
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182 | { |
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183 | chdev_xp = chdev_dir.dma[channel]; |
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184 | if( chdev_xp != XPTR_NULL) |
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185 | { |
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186 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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187 | vfs_add_child_in_parent( local_cxy, |
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188 | INODE_TYPE_DEV, |
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189 | FS_TYPE_DEVFS, |
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190 | *devfs_internal_inode_xp, |
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191 | chdev_ptr->name, |
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192 | GET_PTR( chdev_xp ), |
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193 | &inode_xp ); |
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194 | } |
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195 | } |
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196 | |
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197 | // create an IOB inode in cluster containing IOB chdev |
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198 | chdev_xp = chdev_dir.iob; |
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199 | if( chdev_xp != XPTR_NULL ) |
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200 | { |
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201 | chdev_cxy = GET_CXY( chdev_xp ); |
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202 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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203 | if( chdev_cxy == local_cxy ) |
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204 | { |
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205 | vfs_add_child_in_parent( local_cxy, |
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206 | INODE_TYPE_DEV, |
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207 | FS_TYPE_DEVFS, |
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208 | devfs_external_inode_xp, |
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209 | chdev_ptr->name, |
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210 | GET_PTR( chdev_xp ), |
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211 | &inode_xp ); |
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212 | } |
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213 | } |
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214 | |
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215 | // create a PIC inode in cluster containing PIC chdev |
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216 | chdev_xp = chdev_dir.pic; |
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217 | if( chdev_xp != XPTR_NULL ) |
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218 | { |
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219 | chdev_cxy = GET_CXY( chdev_xp ); |
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220 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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221 | if( chdev_cxy == local_cxy ) |
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222 | { |
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223 | vfs_add_child_in_parent( local_cxy, |
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224 | INODE_TYPE_DEV, |
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225 | FS_TYPE_DEVFS, |
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226 | devfs_external_inode_xp, |
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227 | chdev_ptr->name, |
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228 | GET_PTR( chdev_xp ), |
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229 | &inode_xp ); |
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230 | } |
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231 | } |
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232 | |
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233 | // create a TXT_RX inode in each cluster containing a TXT_RX chdev |
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234 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
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235 | { |
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236 | chdev_xp = chdev_dir.txt_rx[channel]; |
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237 | if( chdev_xp != XPTR_NULL ) |
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238 | { |
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239 | chdev_cxy = GET_CXY( chdev_xp ); |
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240 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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241 | if( chdev_cxy == local_cxy ) |
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242 | { |
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243 | vfs_add_child_in_parent( local_cxy, |
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244 | INODE_TYPE_DEV, |
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245 | FS_TYPE_DEVFS, |
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246 | devfs_external_inode_xp, |
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247 | chdev_ptr->name, |
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248 | GET_PTR( chdev_xp ), |
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249 | &inode_xp ); |
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250 | } |
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251 | } |
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252 | } |
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253 | |
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254 | // create a TXT_TX inode in each cluster containing a TXT_TX chdev |
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255 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
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256 | { |
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257 | chdev_xp = chdev_dir.txt_tx[channel]; |
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258 | if( chdev_xp != XPTR_NULL ) |
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259 | { |
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260 | chdev_cxy = GET_CXY( chdev_xp ); |
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261 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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262 | if( chdev_cxy == local_cxy ) |
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263 | { |
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264 | vfs_add_child_in_parent( local_cxy, |
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265 | INODE_TYPE_DEV, |
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266 | FS_TYPE_DEVFS, |
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267 | devfs_external_inode_xp, |
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268 | chdev_ptr->name, |
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269 | GET_PTR( chdev_xp ), |
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270 | &inode_xp ); |
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271 | } |
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272 | } |
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273 | } |
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274 | |
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275 | // create an IOC inode in each cluster containing an IOC chdev |
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276 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
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277 | { |
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278 | chdev_xp = chdev_dir.ioc[channel]; |
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279 | if( chdev_xp != XPTR_NULL ) |
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280 | { |
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281 | chdev_cxy = GET_CXY( chdev_xp ); |
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282 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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283 | if( chdev_cxy == local_cxy ) |
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284 | { |
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285 | vfs_add_child_in_parent( local_cxy, |
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286 | INODE_TYPE_DEV, |
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287 | FS_TYPE_DEVFS, |
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288 | devfs_external_inode_xp, |
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289 | chdev_ptr->name, |
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290 | GET_PTR( chdev_xp ), |
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291 | &inode_xp ); |
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292 | } |
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293 | } |
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294 | } |
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295 | |
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296 | // create a FBF inode in each cluster containing a FBF chdev |
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297 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
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298 | { |
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299 | chdev_xp = chdev_dir.fbf[channel]; |
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300 | if( chdev_xp != XPTR_NULL ) |
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301 | { |
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302 | chdev_cxy = GET_CXY( chdev_xp ); |
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303 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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304 | if( chdev_cxy == local_cxy ) |
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305 | { |
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306 | vfs_add_child_in_parent( local_cxy, |
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307 | INODE_TYPE_DEV, |
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308 | FS_TYPE_DEVFS, |
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309 | devfs_external_inode_xp, |
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310 | chdev_ptr->name, |
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311 | GET_PTR( chdev_xp ), |
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312 | &inode_xp ); |
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313 | } |
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314 | } |
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315 | } |
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316 | |
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317 | // create a NIC_RX inode in each cluster containing a NIC_RX chdev |
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318 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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319 | { |
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320 | chdev_xp = chdev_dir.nic_rx[channel]; |
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321 | if( chdev_xp != XPTR_NULL ) |
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322 | { |
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323 | chdev_cxy = GET_CXY( chdev_xp ); |
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324 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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325 | if( chdev_cxy == local_cxy ) |
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326 | { |
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327 | vfs_add_child_in_parent( local_cxy, |
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328 | INODE_TYPE_DEV, |
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329 | FS_TYPE_DEVFS, |
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330 | devfs_external_inode_xp, |
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331 | chdev_ptr->name, |
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332 | GET_PTR( chdev_xp ), |
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333 | &inode_xp ); |
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334 | } |
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335 | } |
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336 | } |
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337 | |
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338 | // create a NIC_TX inode in each cluster containing a NIC_TX chdev |
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339 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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340 | { |
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341 | chdev_xp = chdev_dir.nic_tx[channel]; |
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342 | if( chdev_xp != XPTR_NULL ) |
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343 | { |
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344 | chdev_cxy = GET_CXY( chdev_xp ); |
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345 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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346 | if( chdev_cxy == local_cxy ) |
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347 | { |
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348 | vfs_add_child_in_parent( local_cxy, |
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349 | INODE_TYPE_DEV, |
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350 | FS_TYPE_DEVFS, |
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351 | devfs_external_inode_xp, |
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352 | chdev_ptr->name, |
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353 | GET_PTR( chdev_xp ), |
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354 | &inode_xp ); |
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355 | } |
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356 | } |
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357 | } |
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358 | |
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359 | #if DEBUG_DEVFS_INIT |
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360 | cycle = (uint32_t)hal_get_cycles(); |
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361 | if( DEBUG_DEVFS_INIT < cycle ) |
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362 | printk("\n[DBG] %s : thread %x exit at cycle %d\n", |
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363 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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364 | #endif |
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365 | |
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366 | } // end devfs_local_init() |
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367 | |
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368 | ////////////////////////////////////////// |
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369 | int devfs_user_move( bool_t to_buffer, |
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370 | xptr_t file_xp, |
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371 | void * u_buf, |
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372 | uint32_t size ) |
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373 | { |
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374 | assert( ( file_xp != XPTR_NULL ) , __FUNCTION__ , "file_xp == XPTR_NULL" ); |
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375 | |
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376 | assert( ( size < CONFIG_TXT_KBUF_SIZE ) , __FUNCTION__ , "string size too large" ); |
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377 | |
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378 | xptr_t chdev_xp; |
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379 | cxy_t chdev_cxy; |
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380 | chdev_t * chdev_ptr; // associated chdev type |
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381 | uint32_t func; // chdev functionnal type |
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382 | uint32_t channel; // chdev channel index |
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383 | error_t error; |
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384 | |
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385 | char k_buf[CONFIG_TXT_KBUF_SIZE]; // local kernel buffer |
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386 | |
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387 | #if (DEBUG_SYS_READ & 1) |
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388 | enter_devfs_read = hal_time_stamp(); |
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389 | #endif |
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390 | |
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391 | #if (DEBUG_SYS_WRITE & 1) |
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392 | enter_devfs_write = hal_time_stamp(); |
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393 | #endif |
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394 | |
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395 | #if DEBUG_DEVFS_MOVE |
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396 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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397 | if( DEBUG_DEVFS_MOVE < cycle ) |
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398 | printk("\n[DBG] %s : thread %x enter / to_mem %d / cycle %d\n", |
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399 | __FUNCTION__ , CURRENT_THREAD , to_buffer , cycle ); |
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400 | #endif |
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401 | |
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402 | // get extended pointer on chdev_xp |
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403 | chdev_xp = chdev_from_file( file_xp ); |
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404 | |
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405 | // get cluster and local pointer on chdev |
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406 | chdev_cxy = GET_CXY( chdev_xp ); |
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407 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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408 | |
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409 | // get chdev functionnal type and channel |
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410 | func = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->func ) ); |
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411 | channel = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
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412 | |
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413 | // action depends on "func" and "to_buffer" |
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414 | if( func == DEV_FUNC_TXT ) |
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415 | { |
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416 | if( to_buffer ) // TXT read |
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417 | { |
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418 | uint32_t i; |
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419 | for( i = 0 ; i < size ; i++ ) |
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420 | { |
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421 | error = dev_txt_read( channel , &k_buf[i] ); |
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422 | |
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423 | if( error ) |
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424 | { |
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425 | return -1; |
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426 | } |
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427 | else |
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428 | { |
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429 | hal_strcpy_to_uspace( u_buf , k_buf , size ); |
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430 | } |
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431 | } |
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432 | |
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433 | #if DEBUG_DEVFS_MOVE |
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434 | cycle = (uint32_t)hal_get_cycles(); |
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435 | if( DEBUG_DEVFS_MOVE < cycle ) |
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436 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", |
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437 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); |
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438 | #endif |
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439 | |
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440 | #if (DEBUG_SYS_READ & 1) |
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441 | exit_devfs_read = hal_time_stamp(); |
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442 | #endif |
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443 | return size; |
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444 | } |
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445 | else // TXT write |
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446 | { |
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447 | hal_strcpy_from_uspace( k_buf , u_buf , size ); |
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448 | |
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449 | error = dev_txt_write( channel , k_buf , size ); |
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450 | if( error ) |
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451 | { |
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452 | return -1; |
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453 | } |
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454 | else |
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455 | { |
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456 | |
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457 | #if DEBUG_DEVFS_MOVE |
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458 | cycle = (uint32_t)hal_get_cycles(); |
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459 | if( DEBUG_DEVFS_MOVE < cycle ) |
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460 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", |
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461 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); |
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462 | #endif |
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463 | |
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464 | #if (DEBUG_SYS_WRITE & 1) |
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465 | exit_devfs_write = hal_time_stamp(); |
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466 | #endif |
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467 | return size; |
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468 | } |
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469 | } |
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470 | } |
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471 | else |
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472 | { |
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473 | assert( false , __FUNCTION__ , |
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474 | "%s does not support direct user access", chdev_func_str(func) ); |
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475 | |
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476 | return -1; |
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477 | } |
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478 | |
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479 | } // end devfs_user_move() |
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480 | |
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481 | |
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